Level.



PATENTED FEB. 27, 1906. R. LEONHART.

LEVEL.

APPLICATION FILED 00124, 1905.v

Witnesses fizzdaZMZwzzizarZ nventor. 1 I, l I by MAM,

UNITED STATES PATENT OFFICE.

LEVEL.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed October 4:, 1905. Serial No. 281,334.

To all whom it may concern:

Be it known that I, RUDOLPH LEONHART, a citizen of the United States,residing at San Anselmo, in the county of Marin and State of California,have invented a new and useful Level, of which the following is aspecification.

This invention relates to levels employed by carpenters, masons, andlike workmen or mechanics, and has for its object to simplify andimprove the construction and increase the efficiency and utility ofdevices of this character.

With these and other objects in view, which will appear as the nature ofthe invention is better understood, the invention consists in certainnovel features of construction, as hereinafter fully described andclaimed.

In the accompanying drawings, forming a part of this specification, andin which corre sponding parts are denoted by like designatingcharacters, is illustrated the preferred form of embodiment of theinvention capable of carrying the same into practical operation, itbeing understood that various changes in the form, proportion, and minordetails of construction may be resorted to without departing from theprinci le or sacrificing any of the advantages of t 's invention withinthe scope of the appended claim.

In the drawings, Figure 1 is a side eleva tion of a portion of astraight-edge with the improvement applied thereto, Fig. 2 is atransverse section on the line 2 2 of Fig. 1. Fig. 3 is an end elevationillustrating a modified arrangement of the parts.

The improved device comprises a plate 10, preferably annular in shape orwith a central transverse aperture 11 and with means, such as curvedslots 12 13, for receiving the binding-screws 14 15, by which the plateis attached to a straight-edge, a portion of which is represented at 16.The straight-edge is also provided with a transverse aperture 17opposite the aperture 11 in the plate 10, and the slots 12 13 are eachenlarged at one end to enable the plate to be readily attached to anddetached from the straight-edge when required or rotatively adjustedthereon as required. Disposed transversely of the plate 10 and extendingacross the aperture 11 is a tubular member 18, preferably integral withthe plate and open at one end, as at 19. The tubular member is alsoprovided with a longitudinal aperture 20 in the upper side.

The tubular member is designed to support a glass level-bulb 21 of theusual form, which /is inserted through the open end 19 and se-' cured inposition by cement in the ordinary manner.

. By this simple arrangement a very complete and accurate level may beconstructed by providing an ordinary straight-edge with a transverseaperture 17 and placing the plate 10, with its levelbulb attached, toone side thereof and adjusting the plate by means of the slots 12 13until the bulb is in the required position.

The straight edge may be made of the cheapest material, such as asection of a board, with one true edge and a socket or aperture toreceive the tubular member 18.

The cavity for the reception of the tubular member 18 will preferablyextend entirely through the straight-edge 16, so thatthe bulb may beread from either side, or the plate may be reversed in position andattached to the member 16 with the tubular member outward, as in Fig. 3,and without any aperture or recess in the member 16.

When not required, the plate with its bulb attachment can be detachedfrom the member 16 and packed with the owners other tools or implementsfor transportation. This is one of the material advantages of theimproved device, as the workman need not transport a cumbersome andrelatively heavy straight-edge from place to place in pursuing hisvocation, as by possessing one of the comparatively small and lightplates 10 with its bulb-tube attached he can quickly complete the deviceby constructing the straight-edge portion from otherwise waste materialwhere it is'required to use the implement.

The plate 10 and its tubular member 18 will preferably be cast from onepiece of brass, iron, or other metal and may be polished and plated, ifrequired.

Having thus described the invention, what iscIaimed is As a new article,aplate having a transverse aperture and with a tubular member disposedtransversely of said aperture and open at one end and with alongitudinal aperture in one my own I have hereto afliXed my signaturein side opposite the aperture in the plate, said the presence of twoWitnesses.

tubular member adapted to support a spirittube with its central portionexposed through RUDOLPH LEONHART' 5 said apertures and means forattaching said Witnesses:

plate to a straightedge. BENJAMIN F. SNELFLOHN,

In testimony that I claim the foregoing as THoMAs B. SMITH.

